Vacuum pump

Abstract

The utility model discloses a vacuum pump which comprises a pump shell, a rotary driving part, an air guide shell and a cold air shell. The pump shell is hollow to form a cavity, the two ends of the pump shell are a first connecting end and a second connecting end respectively, and a cold air outlet is formed in the side wall of the pump shell. The rotation driving part is arranged in the cavity and provided with a rotating shaft, and the two ends of the rotating shaft extend out of the cavity respectively; the air guide shell is connected with the first connecting end and provided with a first air draft chamber, a first impeller is arranged in the first air draft chamber, the air guide shell is provided with an air inlet and an air outlet, and the end of the rotating shaft is in driving connection with the first impeller; the cold air shell is connected with the second connecting end and provided with a second air draft chamber, a second impeller is arranged in the second air draft chamber, the cold air shell is provided with a cold air inlet, the cold air inlet and the cavity are communicated with the second air draft chamber, and the other end of the rotating shaft is in driving connection with the second impeller. The cooling device is simple in structure, efficient in cooling and energy-saving.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum equipment technical field, especially a vacuum pump. BACKGROUND

[0002] The vacuum pump can be used for pumping the container to obtain the vacuum device, during the use of the vacuum pump, the components may be overheated due to friction and other factors, therefore, the vacuum pump generally needs to be provided with a cooling structure to cool the driving components. The existing vacuum pump adopts water cooling to achieve cooling, the water flow carries away the heat in the vacuum pump, which needs to use a driving component to drive the water flow into the vacuum pump, the energy consumption is large, and the sealing performance of the water cooling structure is very high, the sealing structure is relatively complex, and the water flow may erode the water cooling structure after long time use, so that the sealing performance of the water cooling structure is reduced, and the safety performance is also low. SUMMARY

[0003] The utility model discloses at least solve one of the technical problems in the prior art. To this end, the utility model provides a kind of vacuum pump.

[0004] The utility model solves the technical problem of the utility model, and the solution is as follows:

[0005] A kind of vacuum pump, comprising:

[0006] Pump shell, hollowly formed cavity, the two ends of the pump shell along length direction are first connecting end and second connecting end respectively, the side wall of the pump shell is equipped with cold air outlet, the cold air outlet is communicated with the cavity;

[0007] Rotary driving component, is located in the cavity, the rotary driving component is equipped with shaft, the shaft is extended along the length direction of cavity and is arranged, the two ends of the shaft respectively extend the cavity;

[0008] Air guide shell, is connected with the first connecting end, the air guide shell hollowly forms first air suction chamber, the first air suction chamber is equipped with first impeller, the air guide shell is equipped with air inlet and air outlet, the air inlet and the air outlet are communicated with the first air suction chamber respectively, the end of the shaft is drivenly connected with the first impeller, when the first impeller rotates, drive air enters the first air suction chamber from the air inlet and is discharged from the air outlet;

[0009] The cold air shell is connected with the second connecting end, a second air suction chamber is formed in the cold air shell, a second impeller is arranged in the second air suction chamber, the cold air shell is provided with a cold air inlet, the cold air inlet and the cavity are communicated with the second air suction chamber respectively, and the other end of the rotating shaft is drivingly connected with the second impeller.

[0010] The vacuum pump of the embodiment adopts pure air cooling to cool the cavity, cold air enters the cavity by driving the second impeller to rotate through the rotating driving part, the first impeller and the second impeller are driven to rotate through the same rotating shaft, the driving part for cold air entering does not need to be additionally arranged, the structure is simpler, energy consumption can be reduced, cooling is more efficient, the problem of erosion of water flow on the internal structure of the vacuum pump in the water cooling structure can be solved, and safety performance is higher.

[0011] As a further improvement of the above technical solution, the vacuum pump further comprises an air cooling shell, the air cooling shell is sleeved on the outside of the rotating driving part, a shell wall of the air cooling shell is provided with a plurality of cooling flow channels, an inlet end of the cooling flow channel is arranged towards the air guide shell, and an outlet end of the cooling flow channel is communicated with the cold air outlet.

[0012] As a further improvement of the above technical solution, the vacuum pump further comprises a cold air filter, the cold air filter is connected with the cold air shell and arranged at the cold air inlet.

[0013] As a further improvement of the above technical solution, the vacuum pump further comprises a magnetic bearing, the magnetic bearing is sleeved on the outer periphery of the rotating shaft and connected with the inner wall of the cavity.

[0014] As a further improvement of the above technical solution, the magnetic bearing is provided with a position sensor, the outer periphery of the rotating shaft is provided with a sensor rotor, the sensor rotor rotates with the rotating shaft, the position sensor is arranged on the outer periphery of the sensor rotor and arranged towards the sensor rotor.

[0015] As a further improvement of the above technical solution, the vacuum pump further comprises a steam-water separator, and an outlet end of the steam-water separator is connected with the air inlet.

[0016] As a further improvement of the above technical solution, the vacuum pump further comprises a variable diameter pipe, two ends of the variable diameter pipe are a large diameter end and a small diameter end respectively, the large diameter end is connected with the outlet end of the steam-water separator, and the small diameter end is connected with the air inlet.

[0017] As a further improvement of the above technical solution, the vacuum pump further comprises an expansion joint, two ends of the expansion joint are connected with the large-diameter end and an outlet end of the steam-water separator respectively.

[0018] As a further improvement of the above technical solution, the vacuum pump further comprises an electric cabinet and a control assembly, the control assembly is arranged in the electric cabinet and is electrically connected with the rotary driving part.

[0019] As a further improvement of the above technical solution, the vacuum pump further comprises a blower, the blower is arranged in the electric cabinet, a side wall of the electric cabinet is provided with a blowing inlet, an upper wall surface of the electric cabinet is provided with a blowing outlet, an inlet end of the blower is communicated with the blowing inlet, and an outlet end of the blower is communicated with the blowing outlet. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly described below. Obviously, the described drawings are only some of the embodiments of the present application, not all the embodiments, and the person skilled in the art can obtain other design schemes and drawings according to these drawings without creative labor.

[0021] Figure 1 is a schematic diagram of the overall structure of the vacuum pump of the embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the main structure of the vacuum pump of the embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the internal structure of the main structure of the vacuum pump of the embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the structure of the air-cooled shell of the vacuum pump of the embodiment of the present application.

[0025] The drawings are as follows: 100, pump shell; 110, cold air outlet; 120, air-cooled shell; 121, cooling flow channel; 122, circular flow channel; 123, inner hole; 200, air guide shell; 210, air inlet; 220, air outlet; 300, cold air shell; 310, cold air inlet; 400, rotating shaft; 410, first impeller; 420, second impeller; 430, sensor rotor; 500, magnetic bearing; 510, position sensor; 600, steam-water separator; 610, reducing pipe; 620, expansion joint; 700, cold air filter; 800, electric cabinet; 810, blowing inlet; 820, blowing outlet; 830, wire outlet hole. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0029] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0030] Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments, based on the embodiments of the present application, other embodiments obtained by the person skilled in the art without creative labor are all within the scope of protection of the present application. The technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0031] With reference to Figure 1 , the present application embodiment proposes a kind of vacuum pump, pure air cooling can be realized, water leakage phenomenon that can avoid water cooling appears, avoid the corrosion of water to the internal component structure of vacuum pump, and, structure is simpler, cooling is more energy-saving, efficient.

[0032] In the present embodiment, the vacuum pump includes pump shell 100, rotating driving component, air guide shell 200 and cold air shell 300. Wherein, air guide shell 200 and cold air shell 300 are connected at both ends of pump shell 100, pump shell 100, air guide shell 200 and cold air shell 300 form the main structure of vacuum pump, with reference to Figure 2 And Figure 3 .

[0033] Specifically, the pump shell 100 is hollow to form a cavity, two ends of the cavity along the length direction are connected with the first connecting end and the second connecting end respectively, the air guide shell 200 is connected with the first connecting end, and the cold air shell 300 is connected with the second connecting end.

[0034] The air guide shell 200 is hollow to form a first air suction chamber, and the cold air shell 300 is hollow to form a second air suction chamber. A rotary driving component is arranged inside the cavity, and the rotary driving component is provided with a rotating shaft 400, the rotating shaft 400 extends along the length direction of the cavity, and two ends of the rotating shaft 400 respectively extend out of the cavity, one end of the rotating shaft 400 extends into the first air suction chamber, and the other end of the rotating shaft 400 extends into the second air suction chamber.

[0035] The air guide shell 200 is provided with an air inlet 210 and an air outlet 220, and the first air suction chamber is provided with a first impeller 410, the first impeller 410 is installed on the end of the rotating shaft 400, the first impeller 410 can rotate under the driving action of the rotary driving component, and the rotation of the first impeller 410 can drive the air to enter the first air suction chamber from the air inlet 210 and then be discharged from the air outlet 220, so as to realize the action of vacuumizing.

[0036] In the embodiment, the air flow channel in the air guide shell 200 is spiral, and the air outlet 220 is opened upward, the air entering the first air suction chamber spirally flows along the air flow channel in the first air suction chamber, so as to improve the efficiency of discharging the air.

[0037] In the embodiment, the air outlet 220 of the air guide shell 200 is provided with an air outlet pipe, the air outlet pipe extends upward, and the diameter of the outlet end of the air outlet pipe is greater than the diameter of the inlet end of the air outlet pipe, so as to further accelerate the discharge of the air.

[0038] The cold air outlet 110 is arranged on the side wall of the pump shell 100, the cold air outlet 110 is arranged in communication with the cavity, and the cold air inlet 310 is arranged on the end of the cold air shell 300. The second air suction chamber is provided with a second impeller 420, the second impeller 420 is connected with the end of the rotating shaft 400, the second impeller 420 can rotate under the driving action of the rotary driving component, and the rotation of the second impeller 420 can drive the cold air to enter the second air suction chamber from the cold air inlet 310, the cold air flows through the cavity and is then discharged through the cold air outlet 110. Since the cold air can enter the cavity and take away the heat generated by the rotary driving component in the cavity, the cavity can be cooled to achieve the cooling effect.

[0039] In the embodiment, the cold air inlet 310 and the air inlet 210 are respectively opened towards opposite directions, the first impeller 410 and the second impeller 420 are opposite in direction, the first impeller 410 and the second impeller 420 are connected on the same rotating shaft 400, the first impeller 410 and the second impeller 420 can be driven to rotate by the same rotating shaft 400, the cold air is driven to enter the vacuum pump from the cold air inlet 310, the air is driven to enter the vacuum pump, the directions of the cold air for cooling and the air to be pumped out are opposite. In this way, no additional driving member for cooling is needed, which greatly reduces energy consumption and is more energy-saving and efficient.

[0040] In the embodiment, the rotating driving member is a motor, which is provided with a stator and a rotor, wherein the stator is installed in the cavity, and the rotor is sleeved outside the rotating shaft 400 and located in the stator and can rotate relative to the stator.

[0041] In some embodiments, the vacuum pump further comprises an air-cooled shell 120 sleeved outside the rotating driving member. Specifically, referring to Figure 4 , the air-cooled shell 120 is provided with an inner hole 123 in the middle, the inner hole 123 extends along the length direction of the cavity and penetrates through the two end faces of the air-cooled shell 120, the air-cooled shell 120 is sleeved outside the stator of the rotating driving member, that is, the stator is located in the inner hole 123 of the air-cooled shell 120.

[0042] The shell wall of the air-cooled shell 120 is provided with a plurality of cooling flow channels 121, the cooling flow channels 121 extend along the length direction of the cavity, and both ends of the cooling flow channels 121 are open, the inlet end of the cooling flow channels 121 is arranged towards one side of the air guide shell 200, and the outlet end of the cooling flow channels 121 is communicated with the cold air outlet 110.

[0043] In the embodiment, the plurality of cooling flow channels 121 are uniformly arranged around the central axis of the air-cooled shell 120, the cold air can enter each cooling flow channel 121 and cool the stator and the rotor of the rotating driving member in the inner hole 123, avoiding local overheating.

[0044] It can be understood that a stopper is arranged between the outlet end of the cooling flow channel 121 and the inner hole 123 of the air-cooled shell 120, the stopper is connected with the inner wall end face of the cavity close to the cold air shell 300, the outer side of the stopper and the inner side wall of the cavity together form a circular ring flow channel 122, the circular ring flow channel 122 is located at the outlet end of the cooling flow channel 121, the circular ring flow channel 122 is arranged around the central axis of the air-cooled shell 120 and is communicated with the cold air outlet 110.

[0045] When cooling, the cold air enters the second air suction chamber through the cold air inlet 310, and after entering the cavity, it first flows in the length direction of the cavity to the end close to the air guide shell 200, and then enters the cooling flow channel 121 through the inlet end of the air cooling shell 120, flows along the cooling flow channel 121 to the outlet end of the cooling flow channel 121, and reaches the circular flow channel 122. The wind with heat flows along the circular flow channel 122 and flows to the cold air outlet 110 and is discharged through the cold air outlet 110.

[0046] It can be understood that in this way, the flow distance of the cold air after entering the cavity can be prolonged, and the cold air can be prevented from flowing out of the cold air outlet 110 directly after entering the cavity, so that the cooling effect of the cold air can be improved, the heat in the cavity can be taken away more uniformly, a better cooling effect can be achieved, and the cooling efficiency can be improved.

[0047] In some embodiments, referring to Figure 1 , the vacuum pump further comprises a cold air filter 700 connected with the cold air shell 300 and arranged at the cold air inlet 310. The cold air filter 700 can filter the cold air entering the second air suction chamber and the cavity, prevent impurities from entering the cavity and damaging the rotating driving components in the cavity, and thus improve the service life of the vacuum pump.

[0048] In some embodiments, referring to Figure 3 , the vacuum pump further comprises a magnetic bearing 500 sleeved on the outer periphery of the rotating shaft 400 and connected with the inner wall of the cavity. The magnetic bearing 500 can support the rotating shaft 400 and has the advantages of small wear, low energy consumption, small noise, no need for lubrication, etc.

[0049] In this embodiment, the magnetic bearing 500 is arranged at both ends of the rotating shaft 400, which can support both ends of the rotating shaft 400 and position the rotating shaft 400 to prevent the rotating shaft 400 from being deflected.

[0050] In some embodiments, the magnetic bearing 500 is provided with a position sensor 510, and the outer periphery of the rotating shaft 400 is provided with a sensor rotor 430. The sensor rotor 430 can rotate with the rotating shaft 400, and the position sensor 510 is arranged on the outer periphery of the sensor rotor 430 and faces the sensor rotor 430.

[0051] It can be understood that the vacuum pump further comprises a control assembly. The position sensor 510 can sense the position of the sensor rotor 430 and transmit a signal to the control assembly of the vacuum pump. By sensing the signal of one rotation of the sensor rotor 430, the rotational speed of the sensor rotor 430 can be obtained, and thus the rotational speed of the motor can be known. When the rotational speed of the motor is abnormal, the staff can timely process it to avoid damage to the motor.

[0052] In some embodiments, referring toFigure 1 The vacuum pump further comprises a water-air separator 600, and an outlet end of the water-air separator 600 is connected with the air inlet 210. The water-air separator 600 can filter water and impurities in the air, so as to avoid the water and impurities in the air from entering the first suction chamber and affecting the service life of the rotary driving component, the first impeller 410 and other structures.

[0053] In some embodiments, the vacuum pump further comprises a variable-diameter pipe 610, and two ends of the variable-diameter pipe 610 are a large-diameter end and a small-diameter end respectively. The large-diameter end is connected with the outlet end of the water-air separator 600. After the air is filtered by the water-air separator 600, the air enters the variable-diameter pipe 610 through the large-diameter end. The small-diameter end of the variable-diameter pipe 610 is connected with the air inlet 210. The air in the variable-diameter pipe 610 enters the first suction chamber through the small-diameter end.

[0054] It can be understood that the variable-diameter pipe 610 can increase the pressure of the air entering the first suction chamber, so that the air is more easily to enter the first suction chamber, and the energy consumption is reduced to a certain extent. In addition, the variable-diameter pipe 610 can also adapt to different diameters of the outlet end of the water-air separator 600 and the air inlet 210.

[0055] In some embodiments, the vacuum pump further comprises an expansion joint 620, and the expansion joint 620 is arranged between the variable-diameter pipe 610 and the water-air separator 600. One end of the expansion joint 620 is connected with the large-diameter end of the variable-diameter pipe 610, and the other end of the expansion joint 620 is connected with the outlet end of the water-air separator 600.

[0056] In the embodiment, the expansion joint 620 can be transversely expanded and contracted, i.e. expanded and contracted along the length direction of the cavity, so as to compensate the deformation of the pipeline in the process of thermal expansion and cold contraction, absorb the vibration of the equipment, and reduce the influence of the vibration on the variable-diameter pipe 610, the water-air separator 600 and other structures.

[0057] In some embodiments, the vacuum pump further comprises an electric cabinet 800, and the control component of the vacuum pump is arranged in the electric cabinet 800 and electrically connected with the rotary driving component.

[0058] It can be understood that the side wall of the electric cabinet 800 is provided with a wire outlet hole 830, and the electric wire of the rotary driving component passes through the wire outlet hole 830 to be connected to the control component in the electric cabinet 800, so that the rotary driving component can be controlled by the control component in the electric cabinet 800, which is more convenient for the operator to operate, and the electric cabinet 800 can protect the control component.

[0059] It can be understood that the control component is further electrically connected with the position sensor 510 of the magnetic bearing 500. The position signal detected by the position sensor 510 is transmitted to the control component, and can be displayed through the display screen in the control component.

[0060] In some embodiments, the vacuum pump further comprises a blower, the blower is arranged in the electric cabinet 800, a side wall of the electric cabinet 800 is provided with a blowing inlet 810, an inlet end of the blower is communicated with the blowing inlet 810, an upper wall surface of the electric cabinet 800 is provided with a blowing outlet 820, and an outlet end of the blower is communicated with the blowing outlet 820.

[0061] It can be understood that the cold air can enter into the electric cabinet 800 through the blowing inlet 810 under the driving action of the blower, flow in the electric cabinet 800, and then be discharged through the blowing outlet 820, so as to take away the heat generated by the control assembly and other structures, avoid the overheating of the control assembly, and improve the service life of the vacuum pump.

[0062] It can be understood that the vacuum pump in the embodiment realizes heat dissipation and cooling in a pure air cooling mode, greatly reduces energy consumption, avoids the water leakage risk caused by water cooling, and is safer and more efficient.

[0063] The preferred embodiments of the utility model are described in detail above, but the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A vacuum pump, characterized by, The vacuum pump comprises a pump shell, a rotating driving component, an air guide shell, an air cooling shell, a cold air filter, a magnetic bearing, a steam-water separator, a variable diameter pipe, a telescopic joint, an air blower, an electric cabinet and a control assembly. The pump shell is hollow to form a cavity, and has a first connecting end and a second connecting end at two ends along a length direction. The rotating driving component is arranged in the cavity and has a rotating shaft extending along the length direction of the cavity. The air guide shell is connected with the first connecting end and has a first air suction chamber formed therein. The air guide shell has an air inlet and an air outlet, which are communicated with the first air suction chamber.

2. Vacuum pump according to claim 1, characterized in that The cold air shell is connected with the second connecting end and has a second air suction chamber formed therein.

3. Vacuum pump according to claim 1, characterized in that The cold air shell has a cold air inlet communicated with the second air suction chamber.

4. The vacuum pump of claim 1, wherein, The air cooling shell is sleeved outside the rotating driving component and has a plurality of cooling flow channels formed in a shell wall thereof.

5. Vacuum pump according to claim 4, characterized in that The cooling flow channels have inlet ends facing the air guide shell and outlet ends communicated with the cold air outlet.

6. The vacuum pump of claim 1, wherein, The cold air filter is connected with the cold air shell and arranged at the cold air inlet.

7. Vacuum pump according to claim 6, characterized in that The magnetic bearing is sleeved outside a periphery of the rotating shaft and connected with an inner wall of the cavity.

8. Vacuum pump according to claim 7, characterized in that The magnetic bearing is provided with a position sensor, and the periphery of the rotating shaft is provided with a sensor rotor.

9. The vacuum pump of claim 1, wherein, The sensor rotor rotates with the rotating shaft, and the position sensor is arranged outside the periphery of the sensor rotor and faces the sensor rotor.

10. Vacuum pump according to claim 9, characterized in that The steam-water separator has an outlet end connected with the air inlet. The variable diameter pipe has a large diameter end connected with the outlet end of the steam-water separator and a small diameter end connected with the air inlet. The telescopic joint has two ends connected with the large diameter end and the outlet end of the steam-water separator. The air blower is arranged in the electric cabinet. The electric cabinet has a side wall provided with an air inlet and an upper wall provided with an air outlet. The inlet end of the air blower is communicated with the air inlet, and the outlet end of the air blower is communicated with the air outlet.

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